/src/capstonenext/arch/ARM/ARMMapping.c

Source
/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
/*    Rot127 <unisono@quyllur.org>, 2022-2023 */

#ifdef CAPSTONE_HAS_ARM

#include <stdio.h>
#include <string.h>

#include "capstone/arm.h"
#include "capstone/capstone.h"

#include "../../Mapping.h"
#include "../../MCDisassembler.h"
#include "../../cs_priv.h"
#include "../../cs_simple_types.h"

#include "ARMAddressingModes.h"
#include "ARMDisassemblerExtension.h"
#include "ARMBaseInfo.h"
#include "ARMLinkage.h"
#include "ARMInstPrinter.h"
#include "ARMMapping.h"

static const name_map insn_alias_mnem_map[] = {
#include "ARMGenCSAliasMnemMap.inc"
  { ARM_INS_ALIAS_ASR, "asr" },    { ARM_INS_ALIAS_LSL, "lsl" },
  { ARM_INS_ALIAS_LSR, "lsr" },    { ARM_INS_ALIAS_ROR, "ror" },
  { ARM_INS_ALIAS_RRX, "rrx" },    { ARM_INS_ALIAS_UXTW, "uxtw" },
  { ARM_INS_ALIAS_LDM, "ldm" },    { ARM_INS_ALIAS_POP, "pop" },
  { ARM_INS_ALIAS_PUSH, "push" },    { ARM_INS_ALIAS_POPW, "pop.w" },
  { ARM_INS_ALIAS_PUSHW, "push.w" }, { ARM_INS_ALIAS_VPOP, "vpop" },
  { ARM_INS_ALIAS_VPUSH, "vpush" },  { ARM_INS_ALIAS_END, NULL }
};

static const char *get_custom_reg_alias(unsigned reg)
{
  switch (reg) {
  case ARM_REG_R9:
    return "sb";
  case ARM_REG_R10:
    return "sl";
  case ARM_REG_R11:
    return "fp";
  case ARM_REG_R12:
    return "ip";
  case ARM_REG_R13:
    return "sp";
  case ARM_REG_R14:
    return "lr";
  case ARM_REG_R15:
    return "pc";
  }
  return NULL;
}

const char *ARM_reg_name(csh handle, unsigned int reg)
{
  int syntax_opt = ((cs_struct *)(uintptr_t)handle)->syntax;
  const char *alias = get_custom_reg_alias(reg);
  if ((syntax_opt & CS_OPT_SYNTAX_CS_REG_ALIAS) && alias)
    return alias;

  if (reg == ARM_REG_INVALID || reg >= ARM_REG_ENDING) {
    // This might be a system register or banked register encoding.
    // Note: The system and banked register encodings can overlap.
    // So this might return a system register name although a
    // banked register name is expected.
    const ARMSysReg_MClassSysReg *sys_reg =
      ARMSysReg_lookupMClassSysRegByEncoding(reg);
    if (sys_reg)
      return sys_reg->Name;
    const ARMBankedReg_BankedReg *banked_reg =
      ARMBankedReg_lookupBankedRegByEncoding(reg);
    if (banked_reg)
      return banked_reg->Name;
  }

  if (syntax_opt & CS_OPT_SYNTAX_NOREGNAME) {
    return ARM_LLVM_getRegisterName(reg, ARM_NoRegAltName);
  }
  return ARM_LLVM_getRegisterName(reg, ARM_RegNamesRaw);
}

const insn_map arm_insns[] = {
#include "ARMGenCSMappingInsn.inc"
};

void ARM_get_insn_id(cs_struct *h, cs_insn *insn, unsigned int id)
{
  // Not used by ARM. Information is set after disassembly.
}

#define BETWEEN(x, y, z) (x <= y && y <= z)
/// Patches the register names with Capstone specific alias.
/// Those are common alias for registers (e.g. r15 = pc)
/// which are not set in LLVM.
static void patch_cs_reg_alias(char *asm_str)
{
  char *src = asm_str;
  size_t src_len = strlen(src);
  char *dst = asm_str;

  while (*src && src_len >= 2) {
    if (!(src[0] == 'r' && BETWEEN('0', src[1], '9'))) {
      // No r0-r9 register.
      *dst++ = *src++;
      src_len--;
      continue;
    }

    if (src[1] == '9') {
      if (src_len >= 3 ? !BETWEEN('0', src[2], '9') : true) {
        // r9 = sb
        *dst++ = 's';
        *dst++ = 'b';
        src += 2;
      } else {
        *dst++ = *src++;
        *dst++ = *src++;
      }
      src_len -= 2;
      continue;
    }

    if (src_len < 3) {
      break;
    }
    if (src[1] == '1' && BETWEEN('0', src[2], '5')) {
      switch (src[2]) {
      case '0':
        *dst++ = 's';
        *dst++ = 'l';
        break;
      case '1':
        *dst++ = 'f';
        *dst++ = 'p';
        break;
      case '2':
        *dst++ = 'i';
        *dst++ = 'p';
        break;
      case '3':
        *dst++ = 's';
        *dst++ = 'p';
        break;
      case '4':
        *dst++ = 'l';
        *dst++ = 'r';
        break;
      case '5':
        *dst++ = 'p';
        *dst++ = 'c';
        break;
      }
      src += 3;
      src_len -= 3;
      continue;
    }
    src_len--;
    *dst++ = *src++;
  }
  while (*src) {
    *dst++ = *src++;
  }
  *dst = '\0';
}
#undef BETWEEN

/// Check if PC is updated from stack. Those POP instructions
/// are considered of group RETURN.
static void check_pop_return(MCInst *MI)
{
  if (!MI->flat_insn->detail)
    return;
  if (MI->flat_insn->id != ARM_INS_POP &&
      MI->flat_insn->alias_id != ARM_INS_ALIAS_POP) {
    return;
  }
  for (size_t i = 0; i < ARM_get_detail(MI)->op_count; ++i) {
    cs_arm_op *op = &ARM_get_detail(MI)->operands[i];
    if (op->type == ARM_OP_REG && op->reg == ARM_REG_PC) {
      add_group(MI, ARM_GRP_RET);
      return;
    }
  }
}

/// Check if PC is directly written.Those instructions
/// are considered of group BRANCH.
static void check_writes_to_pc(MCInst *MI)
{
  if (!MI->flat_insn->detail)
    return;
  for (size_t i = 0; i < ARM_get_detail(MI)->op_count; ++i) {
    cs_arm_op *op = &ARM_get_detail(MI)->operands[i];
    if (op->type == ARM_OP_REG && op->reg == ARM_REG_PC &&
        (op->access & CS_AC_WRITE)) {
      add_group(MI, ARM_GRP_JUMP);
      return;
    }
  }
}

/// Adds group to the instruction which are not defined in LLVM.
static void ARM_add_cs_groups(MCInst *MI)
{
  if (!MI->flat_insn->detail)
    return;
  check_pop_return(MI);
  check_writes_to_pc(MI);
  unsigned Opcode = MI->flat_insn->id;
  switch (Opcode) {
  default:
    return;
  case ARM_INS_SVC:
    add_group(MI, ARM_GRP_INT);
    break;
  case ARM_INS_CDP:
  case ARM_INS_CDP2:
  case ARM_INS_MCR:
  case ARM_INS_MCR2:
  case ARM_INS_MCRR:
  case ARM_INS_MCRR2:
  case ARM_INS_MRC:
  case ARM_INS_MRC2:
  case ARM_INS_SMC:
    add_group(MI, ARM_GRP_PRIVILEGE);
    break;
  }
}

static void add_alias_details(MCInst *MI)
{
  if (!detail_is_set(MI))
    return;
  switch (MI->flat_insn->alias_id) {
  default:
    return;
  case ARM_INS_ALIAS_POP:
    // Doesn't get set because memop is not printed.
    if (ARM_get_detail(MI)->op_count == 1) {
      CS_ASSERT_RET(
        MI->flat_insn->usesAliasDetails &&
        "Not valid assumption for non alias details.");
      // Only single register pop is post-indexed
      // Assumes only alias details are passed here.
      ARM_get_detail(MI)->post_index = true;
    }
    // fallthrough
  case ARM_INS_ALIAS_PUSH:
  case ARM_INS_ALIAS_VPUSH:
  case ARM_INS_ALIAS_VPOP:
    map_add_implicit_read(MI, ARM_REG_SP);
    map_add_implicit_write(MI, ARM_REG_SP);
    break;
  case ARM_INS_ALIAS_LDM: {
    bool Writeback = true;
    unsigned BaseReg = MCInst_getOpVal(MI, 0);
    for (unsigned i = 3; i < MCInst_getNumOperands(MI); ++i) {
      if (MCInst_getOpVal(MI, i) == BaseReg)
        Writeback = false;
    }
    if (Writeback && detail_is_set(MI)) {
      ARM_get_detail(MI)->operands[0].access |= CS_AC_WRITE;
      MI->flat_insn->detail->writeback = true;
    }
    break;
  }
  case ARM_INS_ALIAS_ASR:
  case ARM_INS_ALIAS_LSL:
  case ARM_INS_ALIAS_LSR:
  case ARM_INS_ALIAS_ROR: {
    unsigned shift_value = 0;
    arm_shifter shift_type = ARM_SFT_INVALID;
    switch (MCInst_getOpcode(MI)) {
    default:
      CS_ASSERT_RET(0 &&
              "ASR, LSL, LSR, ROR alias not handled");
      return;
    case ARM_MOVsi: {
      MCOperand *MO2 = MCInst_getOperand(MI, 2);
      shift_type = (arm_shifter)ARM_AM_getSORegShOp(
        MCOperand_getImm(MO2));

      if (ARM_AM_getSORegShOp(MCOperand_getImm(MO2)) ==
          ARM_AM_rrx) {
        break;
      }
      shift_value = translateShiftImm(
        ARM_AM_getSORegOffset(MCOperand_getImm(MO2)));
      ARM_insert_detail_op_imm_at(MI, -1, shift_value,
                CS_AC_READ);
      break;
    }
    case ARM_MOVsr: {
      MCOperand *MO3 = MCInst_getOperand(MI, (3));
      shift_type =
        ARM_AM_getSORegShOp(MCOperand_getImm(MO3)) +
        ARM_SFT_REG;
      shift_value = MCInst_getOpVal(MI, 2);
      break;
    }
    }
    ARM_get_detail_op(MI, -2)->shift.type = shift_type;
    ARM_get_detail_op(MI, -2)->shift.value = shift_value;
    break;
  }
  }
}

/// Some instructions have their operands not defined but
/// hardcoded as string.
/// Here we add those oprands to detail.
static void ARM_add_not_defined_ops(MCInst *MI)
{
  if (!detail_is_set(MI))
    return;

  if (MI->flat_insn->is_alias && MI->flat_insn->usesAliasDetails) {
    add_alias_details(MI);
    return;
  }

  unsigned Opcode = MCInst_getOpcode(MI);
  switch (Opcode) {
  default:
    return;
  case ARM_t2MOVsra_glue:
  case ARM_t2MOVsrl_glue:
    ARM_insert_detail_op_imm_at(MI, 2, 1, CS_AC_READ);
    break;
  case ARM_VCMPEZD:
  case ARM_VCMPZD:
  case ARM_tRSB:
  case ARM_VCMPEZH:
  case ARM_VCMPEZS:
  case ARM_VCMPZH:
  case ARM_VCMPZS:
    ARM_insert_detail_op_imm_at(MI, -1, 0, CS_AC_READ);
    break;
  case ARM_MVE_VSHLL_lws16bh:
  case ARM_MVE_VSHLL_lws16th:
  case ARM_MVE_VSHLL_lwu16bh:
  case ARM_MVE_VSHLL_lwu16th:
    ARM_insert_detail_op_imm_at(MI, 2, 16, CS_AC_READ);
    break;
  case ARM_MVE_VSHLL_lws8bh:
  case ARM_MVE_VSHLL_lws8th:
  case ARM_MVE_VSHLL_lwu8bh:
  case ARM_MVE_VSHLL_lwu8th:
    ARM_insert_detail_op_imm_at(MI, 2, 8, CS_AC_READ);
    break;
  case ARM_VCEQzv16i8:
  case ARM_VCEQzv2f32:
  case ARM_VCEQzv2i32:
  case ARM_VCEQzv4f16:
  case ARM_VCEQzv4f32:
  case ARM_VCEQzv4i16:
  case ARM_VCEQzv4i32:
  case ARM_VCEQzv8f16:
  case ARM_VCEQzv8i16:
  case ARM_VCEQzv8i8:
  case ARM_VCGEzv16i8:
  case ARM_VCGEzv2f32:
  case ARM_VCGEzv2i32:
  case ARM_VCGEzv4f16:
  case ARM_VCGEzv4f32:
  case ARM_VCGEzv4i16:
  case ARM_VCGEzv4i32:
  case ARM_VCGEzv8f16:
  case ARM_VCGEzv8i16:
  case ARM_VCGEzv8i8:
  case ARM_VCLEzv16i8:
  case ARM_VCLEzv2f32:
  case ARM_VCLEzv2i32:
  case ARM_VCLEzv4f16:
  case ARM_VCLEzv4f32:
  case ARM_VCLEzv4i16:
  case ARM_VCLEzv4i32:
  case ARM_VCLEzv8f16:
  case ARM_VCLEzv8i16:
  case ARM_VCLEzv8i8:
  case ARM_VCLTzv16i8:
  case ARM_VCLTzv2f32:
  case ARM_VCLTzv2i32:
  case ARM_VCLTzv4f16:
  case ARM_VCLTzv4f32:
  case ARM_VCLTzv4i16:
  case ARM_VCLTzv4i32:
  case ARM_VCLTzv8f16:
  case ARM_VCLTzv8i16:
  case ARM_VCLTzv8i8:
  case ARM_VCGTzv16i8:
  case ARM_VCGTzv2f32:
  case ARM_VCGTzv2i32:
  case ARM_VCGTzv4f16:
  case ARM_VCGTzv4f32:
  case ARM_VCGTzv4i16:
  case ARM_VCGTzv4i32:
  case ARM_VCGTzv8f16:
  case ARM_VCGTzv8i16:
  case ARM_VCGTzv8i8:
    ARM_insert_detail_op_imm_at(MI, 2, 0, CS_AC_READ);
    break;
  case ARM_BX_RET:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_LR, CS_AC_READ);
    break;
  case ARM_MOVPCLR:
  case ARM_t2SUBS_PC_LR:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_PC, CS_AC_WRITE);
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_LR, CS_AC_READ);
    break;
  case ARM_FMSTAT:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_APSR_NZCV,
              CS_AC_WRITE);
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPSCR, CS_AC_READ);
    break;
  case ARM_VLDR_FPCXTNS_off:
  case ARM_VLDR_FPCXTNS_post:
  case ARM_VLDR_FPCXTNS_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPCXTNS,
              CS_AC_WRITE);
    break;
  case ARM_VSTR_FPCXTNS_off:
  case ARM_VSTR_FPCXTNS_post:
  case ARM_VSTR_FPCXTNS_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPCXTNS, CS_AC_READ);
    break;
  case ARM_VLDR_FPCXTS_off:
  case ARM_VLDR_FPCXTS_post:
  case ARM_VLDR_FPCXTS_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPCXTS, CS_AC_WRITE);
    break;
  case ARM_VSTR_FPCXTS_off:
  case ARM_VSTR_FPCXTS_post:
  case ARM_VSTR_FPCXTS_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPCXTS, CS_AC_READ);
    break;
  case ARM_VLDR_FPSCR_NZCVQC_off:
  case ARM_VLDR_FPSCR_NZCVQC_post:
  case ARM_VLDR_FPSCR_NZCVQC_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPSCR_NZCVQC,
              CS_AC_WRITE);
    break;
  case ARM_VSTR_FPSCR_NZCVQC_off:
  case ARM_VSTR_FPSCR_NZCVQC_post:
  case ARM_VSTR_FPSCR_NZCVQC_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPSCR_NZCVQC,
              CS_AC_READ);
    break;
  case ARM_VMSR:
  case ARM_VLDR_FPSCR_off:
  case ARM_VLDR_FPSCR_post:
  case ARM_VLDR_FPSCR_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPSCR, CS_AC_WRITE);
    break;
  case ARM_VSTR_FPSCR_off:
  case ARM_VSTR_FPSCR_post:
  case ARM_VSTR_FPSCR_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPSCR, CS_AC_READ);
    break;
  case ARM_VLDR_P0_off:
  case ARM_VLDR_P0_post:
  case ARM_VLDR_P0_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_P0, CS_AC_WRITE);
    break;
  case ARM_VSTR_P0_off:
  case ARM_VSTR_P0_post:
  case ARM_VSTR_P0_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_P0, CS_AC_READ);
    break;
  case ARM_VLDR_VPR_off:
  case ARM_VLDR_VPR_post:
  case ARM_VLDR_VPR_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_VPR, CS_AC_WRITE);
    break;
  case ARM_VSTR_VPR_off:
  case ARM_VSTR_VPR_post:
  case ARM_VSTR_VPR_pre:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_VPR, CS_AC_READ);
    break;
  case ARM_VMSR_FPEXC:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPEXC, CS_AC_WRITE);
    break;
  case ARM_VMSR_FPINST:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPINST, CS_AC_WRITE);
    break;
  case ARM_VMSR_FPINST2:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPINST2,
              CS_AC_WRITE);
    break;
  case ARM_VMSR_FPSID:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_FPSID, CS_AC_WRITE);
    break;
  case ARM_t2SRSDB:
  case ARM_t2SRSIA:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_SP, CS_AC_WRITE);
    break;
  case ARM_t2SRSDB_UPD:
  case ARM_t2SRSIA_UPD:
    ARM_insert_detail_op_reg_at(MI, 0, ARM_REG_SP,
              CS_AC_READ | CS_AC_WRITE);
    break;
  case ARM_MRSsys:
  case ARM_t2MRSsys_AR:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_SPSR, CS_AC_READ);
    break;
  case ARM_MRS:
  case ARM_t2MRS_AR:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_APSR, CS_AC_READ);
    break;
  case ARM_VMRS:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPSCR, CS_AC_READ);
    break;
  case ARM_VMRS_FPCXTNS:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPCXTNS, CS_AC_READ);
    break;
  case ARM_VMRS_FPCXTS:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPCXTS, CS_AC_READ);
    break;
  case ARM_VMRS_FPEXC:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPEXC, CS_AC_READ);
    break;
  case ARM_VMRS_FPINST:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPINST, CS_AC_READ);
    break;
  case ARM_VMRS_FPINST2:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPINST2, CS_AC_READ);
    break;
  case ARM_VMRS_FPSCR_NZCVQC:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPSCR_NZCVQC,
              CS_AC_READ);
    break;
  case ARM_VMRS_FPSID:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_FPSID, CS_AC_READ);
    break;
  case ARM_VMRS_MVFR0:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_MVFR0, CS_AC_READ);
    break;
  case ARM_VMRS_MVFR1:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_MVFR1, CS_AC_READ);
    break;
  case ARM_VMRS_MVFR2:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_MVFR2, CS_AC_READ);
    break;
  case ARM_VMRS_P0:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_P0, CS_AC_READ);
    break;
  case ARM_VMRS_VPR:
    ARM_insert_detail_op_reg_at(MI, 1, ARM_REG_VPR, CS_AC_READ);
    break;
  case ARM_MOVsr:
    // Add shift information
    ARM_get_detail(MI)->operands[1].shift.type =
      (arm_shifter)ARM_AM_getSORegShOp(
        MCInst_getOpVal(MI, 3)) +
      ARM_SFT_REG;
    ARM_get_detail(MI)->operands[1].shift.value =
      MCInst_getOpVal(MI, 2);
    break;
  case ARM_MOVsi:
    if (ARM_AM_getSORegShOp(MCInst_getOpVal(MI, 2)) == ARM_AM_rrx) {
      ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_RRX;
      ARM_get_detail_op(MI, -1)->shift.value =
        translateShiftImm(ARM_AM_getSORegOffset(
          MCInst_getOpVal(MI, 2)));
      return;
    }

    ARM_get_detail_op(MI, -1)->shift.type =
      (arm_shifter)ARM_AM_getSORegShOp(
        MCInst_getOpVal(MI, 2));
    ARM_get_detail_op(MI, -1)->shift.value = translateShiftImm(
      ARM_AM_getSORegOffset(MCInst_getOpVal(MI, 2)));
    break;
  case ARM_tLDMIA: {
    bool Writeback = true;
    unsigned BaseReg = MCInst_getOpVal(MI, 0);
    for (unsigned i = 3; i < MCInst_getNumOperands(MI); ++i) {
      if (MCInst_getOpVal(MI, i) == BaseReg)
        Writeback = false;
    }
    if (Writeback && detail_is_set(MI)) {
      ARM_get_detail(MI)->operands[0].access |= CS_AC_WRITE;
      MI->flat_insn->detail->writeback = true;
    }
    break;
  }
  case ARM_RFEDA_UPD:
  case ARM_RFEDB_UPD:
  case ARM_RFEIA_UPD:
  case ARM_RFEIB_UPD:
    get_detail(MI)->writeback = true;
    // fallthrough
  case ARM_RFEDA:
  case ARM_RFEDB:
  case ARM_RFEIA:
  case ARM_RFEIB: {
    arm_reg base_reg = ARM_get_detail_op(MI, -1)->reg;
    ARM_get_detail_op(MI, -1)->type = ARM_OP_MEM;
    ARM_get_detail_op(MI, -1)->mem.base = base_reg;
  }
  }
}

/// Unfortunately there is currently no way to easily extract
/// information about the vector data usage (sign and width used).
/// See: https://github.com/capstone-engine/capstone/issues/2152
void ARM_add_vector_data(MCInst *MI, arm_vectordata_type data_type)
{
  if (!detail_is_set(MI))
    return;
  ARM_get_detail(MI)->vector_data = data_type;
}

/// Unfortunately there is currently no way to easily extract
/// information about the vector size.
/// See: https://github.com/capstone-engine/capstone/issues/2152
void ARM_add_vector_size(MCInst *MI, unsigned size)
{
  if (!detail_is_set(MI))
    return;
  ARM_get_detail(MI)->vector_size = size;
}

/// For ARM the attributation of post-indexed instructions is poor.
/// Disponents or index register are sometimes not defined as such.
/// Here we try to detect such cases. We check if the base register
/// is a writeback register, but no other memory operand
/// was disassembled.
/// Because there must be a second memory operand (disponent/index)
/// We assume that the following operand is actually
/// the disponent/index reg.
static void ARM_post_index_detection(MCInst *MI)
{
  if (!detail_is_set(MI) || ARM_get_detail(MI)->post_index)
    return;

  int i = 0;
  for (; i < ARM_get_detail(MI)->op_count; ++i) {
    if (ARM_get_detail(MI)->operands[i].type & ARM_OP_MEM)
      break;
  }
  if (i >= ARM_get_detail(MI)->op_count) {
    // Last operand
    return;
  }

  cs_arm_op *op = &ARM_get_detail(MI)->operands[i];
  cs_arm_op op_next = ARM_get_detail(MI)->operands[i + 1];
  if (op_next.type == ARM_OP_INVALID || op->mem.disp != 0 ||
      op->mem.index != ARM_REG_INVALID)
    return;

  if (op_next.type & CS_OP_IMM)
    op->mem.disp = op_next.imm;
  else if (op_next.type & CS_OP_REG)
    op->mem.index = op_next.reg;

  op->subtracted = op_next.subtracted;
  ARM_get_detail(MI)->post_index = true;
  MI->flat_insn->detail->writeback = true;
  ARM_dec_op_count(MI);
}

void ARM_check_mem_access_validity(MCInst *MI)
{
#ifndef CAPSTONE_DIET
  if (!detail_is_set(MI))
    return;
  const arm_suppl_info *suppl = map_get_suppl_info(MI, arm_insns);
  CS_ASSERT_RET(suppl);
  if (suppl->mem_acc == CS_AC_INVALID) {
    return;
  }
  cs_detail *detail = get_detail(MI);
  for (int i = 0; i < detail->arm.op_count; ++i) {
    if (detail->arm.operands[i].type == ARM_OP_MEM &&
        detail->arm.operands[i].access != suppl->mem_acc) {
      detail->arm.operands[i].access = suppl->mem_acc;
      return;
    }
  }
#endif // CAPSTONE_DIET
}

/// Decodes the asm string for a given instruction
/// and fills the detail information about the instruction and its operands.
void ARM_printer(MCInst *MI, SStream *O, void * /* MCRegisterInfo* */ info)
{
  MCRegisterInfo *MRI = (MCRegisterInfo *)info;
  MI->MRI = MRI;
  MI->fillDetailOps = detail_is_set(MI);
  MI->flat_insn->usesAliasDetails = map_use_alias_details(MI);
  MI->flat_insn->alias_id = 0;
  ARM_LLVM_printInstruction(MI, O, info);
  if (!MI->flat_insn->alias_id)
    map_set_alias_id(MI, O, insn_alias_mnem_map,
         ARR_SIZE(insn_alias_mnem_map) - 1);
  ARM_add_not_defined_ops(MI);
  ARM_post_index_detection(MI);
  ARM_check_mem_access_validity(MI);
  ARM_add_cs_groups(MI);
  int syntax_opt = MI->csh->syntax;
  if (syntax_opt & CS_OPT_SYNTAX_CS_REG_ALIAS)
    patch_cs_reg_alias(O->buffer);
}

#ifndef CAPSTONE_DIET
static const char *const insn_name_maps[] = {
#include "ARMGenCSMappingInsnName.inc"
  // Hard coded alias in LLVM, not defined as alias or instruction.
  // We give them a unique ID for convenience.
  "vpop",
  "vpush",
};
#endif

#ifndef CAPSTONE_DIET
static const arm_reg arm_flag_regs[] = {
  ARM_REG_APSR,       ARM_REG_APSR_NZCV, ARM_REG_CPSR,
  ARM_REG_FPCXTNS,      ARM_REG_FPCXTS,  ARM_REG_FPEXC,
  ARM_REG_FPINST,       ARM_REG_FPSCR,   ARM_REG_FPSCR_NZCV,
  ARM_REG_FPSCR_NZCVQC,
};
#endif // CAPSTONE_DIET

const char *ARM_insn_name(csh handle, unsigned int id)
{
#ifndef CAPSTONE_DIET
  if (id < ARM_INS_ALIAS_END && id > ARM_INS_ALIAS_BEGIN) {
    if (id - ARM_INS_ALIAS_BEGIN >= ARR_SIZE(insn_alias_mnem_map))
      return NULL;

    return insn_alias_mnem_map[id - ARM_INS_ALIAS_BEGIN - 1].name;
  }
  if (id >= ARM_INS_ENDING)
    return NULL;

  if (id < ARR_SIZE(insn_name_maps))
    return insn_name_maps[id];

  // not found
  return NULL;
#else
  return NULL;
#endif
}

#ifndef CAPSTONE_DIET
static const name_map group_name_maps[] = {
  // generic groups
  { ARM_GRP_INVALID, NULL },
  { ARM_GRP_JUMP, "jump" },
  { ARM_GRP_CALL, "call" },
  { ARM_GRP_RET, "return" },
  { ARM_GRP_INT, "int" },
  { ARM_GRP_PRIVILEGE, "privilege" },
  { ARM_GRP_BRANCH_RELATIVE, "branch_relative" },

// architecture-specific groups
#include "ARMGenCSFeatureName.inc"
};
#endif

const char *ARM_group_name(csh handle, unsigned int id)
{
#ifndef CAPSTONE_DIET
  return id2name(group_name_maps, ARR_SIZE(group_name_maps), id);
#else
  return NULL;
#endif
}

// list all relative branch instructions
// ie: insns[i].branch && !insns[i].indirect_branch
static const unsigned int insn_rel[] = {
  ARM_BL,   ARM_BLX_pred, ARM_Bcc,   ARM_t2B,  ARM_t2Bcc,
  ARM_tB,   ARM_tBcc, ARM_tCBNZ, ARM_tCBZ, ARM_BL_pred,
  ARM_BLXi, ARM_tBL,  ARM_tBLXi, 0
};

static const unsigned int insn_blx_rel_to_arm[] = { ARM_tBLXi, 0 };

// check if this insn is relative branch
bool ARM_rel_branch(cs_struct *h, unsigned int id)
{
  int i;

  for (i = 0; insn_rel[i]; i++) {
    if (id == insn_rel[i]) {
      return true;
    }
  }

  // not found
  return false;
}

bool ARM_blx_to_arm_mode(cs_struct *h, unsigned int id)
{
  int i;

  for (i = 0; insn_blx_rel_to_arm[i]; i++)
    if (id == insn_blx_rel_to_arm[i])
      return true;

  // not found
  return false;
}

void ARM_check_updates_flags(MCInst *MI)
{
#ifndef CAPSTONE_DIET
  if (!detail_is_set(MI))
    return;
  cs_detail *detail = get_detail(MI);
  for (int i = 0; i < detail->regs_write_count; ++i) {
    if (detail->regs_write[i] == 0)
      return;
    for (int j = 0; j < ARR_SIZE(arm_flag_regs); ++j) {
      if (detail->regs_write[i] == arm_flag_regs[j]) {
        detail->arm.update_flags = true;
        return;
      }
    }
  }
#endif // CAPSTONE_DIET
}

void ARM_set_instr_map_data(MCInst *MI)
{
  map_cs_id(MI, arm_insns, ARR_SIZE(arm_insns));
  map_implicit_reads(MI, arm_insns);
  map_implicit_writes(MI, arm_insns);
  ARM_check_updates_flags(MI);
  map_groups(MI, arm_insns);
}

bool ARM_getInstruction(csh handle, const uint8_t *code, size_t code_len,
      MCInst *instr, uint16_t *size, uint64_t address,
      void *info)
{
  ARM_init_cs_detail(instr);
  DecodeStatus Result = ARM_LLVM_getInstruction(
    handle, code, code_len, instr, size, address, info);
  ARM_set_instr_map_data(instr);
  if (Result == MCDisassembler_SoftFail) {
    MCInst_setSoftFail(instr);
  }
  return Result != MCDisassembler_Fail;
}

#define GET_REGINFO_MC_DESC
#include "ARMGenRegisterInfo.inc"

void ARM_init_mri(MCRegisterInfo *MRI)
{
  MCRegisterInfo_InitMCRegisterInfo(MRI, ARMRegDesc, ARM_REG_ENDING, 0, 0,
            ARMMCRegisterClasses,
            ARR_SIZE(ARMMCRegisterClasses), 0, 0,
            ARMRegDiffLists, 0, ARMSubRegIdxLists,
            ARR_SIZE(ARMSubRegIdxLists), 0);
}

#ifndef CAPSTONE_DIET
static const map_insn_ops insn_operands[] = {
#include "ARMGenCSMappingInsnOp.inc"
};

void ARM_reg_access(const cs_insn *insn, cs_regs regs_read,
        uint8_t *regs_read_count, cs_regs regs_write,
        uint8_t *regs_write_count)
{
  uint8_t i;
  uint8_t read_count, write_count;
  cs_arm *arm = &(insn->detail->arm);

  read_count = insn->detail->regs_read_count;
  write_count = insn->detail->regs_write_count;

  // implicit registers
  memcpy(regs_read, insn->detail->regs_read,
         read_count * sizeof(insn->detail->regs_read[0]));
  memcpy(regs_write, insn->detail->regs_write,
         write_count * sizeof(insn->detail->regs_write[0]));

  // explicit registers
  for (i = 0; i < arm->op_count; i++) {
    cs_arm_op *op = &(arm->operands[i]);
    switch ((int)op->type) {
    case ARM_OP_REG:
      if ((op->access & CS_AC_READ) &&
          !arr_exist(regs_read, read_count, op->reg)) {
        regs_read[read_count] = (uint16_t)op->reg;
        read_count++;
      }
      if ((op->access & CS_AC_WRITE) &&
          !arr_exist(regs_write, write_count, op->reg)) {
        regs_write[write_count] = (uint16_t)op->reg;
        write_count++;
      }
      break;
    case ARM_OP_MEM:
      // registers appeared in memory references always being read
      if ((op->mem.base != ARM_REG_INVALID) &&
          !arr_exist(regs_read, read_count, op->mem.base)) {
        regs_read[read_count] = (uint16_t)op->mem.base;
        read_count++;
      }
      if ((op->mem.index != ARM_REG_INVALID) &&
          !arr_exist(regs_read, read_count, op->mem.index)) {
        regs_read[read_count] = (uint16_t)op->mem.index;
        read_count++;
      }
      if ((insn->detail->writeback) &&
          (op->mem.base != ARM_REG_INVALID) &&
          !arr_exist(regs_write, write_count, op->mem.base)) {
        regs_write[write_count] =
          (uint16_t)op->mem.base;
        write_count++;
      }
    default:
      break;
    }
  }

  *regs_read_count = read_count;
  *regs_write_count = write_count;
}
#endif

void ARM_setup_op(cs_arm_op *op)
{
  memset(op, 0, sizeof(cs_arm_op));
  op->type = ARM_OP_INVALID;
  op->vector_index = -1;
  op->neon_lane = -1;
}

void ARM_init_cs_detail(MCInst *MI)
{
  if (detail_is_set(MI)) {
    unsigned int i;

    memset(get_detail(MI), 0,
           offsetof(cs_detail, arm) + sizeof(cs_arm));

    for (i = 0; i < ARR_SIZE(ARM_get_detail(MI)->operands); i++)
      ARM_setup_op(&ARM_get_detail(MI)->operands[i]);
    ARM_get_detail(MI)->cc = ARMCC_UNDEF;
    ARM_get_detail(MI)->vcc = ARMVCC_None;
  }
}

static uint64_t t_add_pc(MCInst *MI, uint64_t v)
{
  int32_t imm = (int32_t)v;
  if (ARM_rel_branch(MI->csh, MI->Opcode)) {
    uint32_t address;

    // only do this for relative branch
    if (MI->csh->mode & CS_MODE_THUMB) {
      address = (uint32_t)MI->address + 4;
      if (ARM_blx_to_arm_mode(MI->csh, MI->Opcode)) {
        // here need to align down to the nearest 4-byte address
#define _ALIGN_DOWN(v, align_width) ((v / align_width) * align_width)
        address = _ALIGN_DOWN(address, 4);
#undef _ALIGN_DOWN
      }
    } else {
      address = (uint32_t)MI->address + 8;
    }

    imm += address;
    return imm;
  }
  return v;
}

/// Transform a Qs register to its corresponding Ds + Offset register.
static uint64_t t_qpr_to_dpr_list(MCInst *MI, unsigned OpNum, uint8_t offset)
{
  uint64_t v = MCOperand_getReg(MCInst_getOperand(MI, OpNum));
  if (v >= ARM_REG_Q0 && v <= ARM_REG_Q15)
    return ARM_REG_D0 + offset + (v - ARM_REG_Q0) * 2;
  return v + offset;
}

static uint64_t t_mod_imm_rotate(uint64_t v)
{
  unsigned Bits = v & 0xFF;
  unsigned Rot = (v & 0xF00) >> 7;
  int32_t Rotated = ARM_AM_rotr32(Bits, Rot);
  return Rotated;
}

inline static uint64_t t_mod_imm_bits(uint64_t v)
{
  unsigned Bits = v & 0xFF;
  return Bits;
}

inline static uint64_t t_mod_imm_rot(uint64_t v)
{
  unsigned Rot = (v & 0xF00) >> 7;
  return Rot;
}

static uint64_t t_vmov_mod_imm(uint64_t v)
{
  unsigned EltBits;
  uint64_t Val = ARM_AM_decodeVMOVModImm(v, &EltBits);
  return Val;
}

/// Initializes or finishes a memory operand of Capstone (depending on \p
/// status). A memory operand in Capstone can be assembled by two LLVM operands.
/// E.g. the base register and the immediate disponent.
static void ARM_set_mem_access(MCInst *MI, bool status)
{
  if (!detail_is_set(MI))
    return;
  set_doing_mem(MI, status);
  if (status) {
    ARM_get_detail_op(MI, 0)->type = ARM_OP_MEM;
    ARM_get_detail_op(MI, 0)->mem.base = ARM_REG_INVALID;
    ARM_get_detail_op(MI, 0)->mem.index = ARM_REG_INVALID;
    ARM_get_detail_op(MI, 0)->mem.scale = 1;
    ARM_get_detail_op(MI, 0)->mem.disp = 0;

#ifndef CAPSTONE_DIET
    uint8_t access =
      map_get_op_access(MI, ARM_get_detail(MI)->op_count);
    ARM_get_detail_op(MI, 0)->access = access;
#endif
  } else {
    // done, select the next operand slot
    ARM_check_safe_inc(MI);
    ARM_inc_op_count(MI);
  }
}

/// Fills cs_detail with operand shift information for the last added operand.
static void add_cs_detail_RegImmShift(MCInst *MI, ARM_AM_ShiftOpc ShOpc,
              unsigned ShImm)
{
  if (ShOpc == ARM_AM_no_shift || (ShOpc == ARM_AM_lsl && !ShImm))
    return;

  if (!detail_is_set(MI))
    return;

  if (doing_mem(MI))
    ARM_get_detail_op(MI, 0)->shift.type = (arm_shifter)ShOpc;
  else
    ARM_get_detail_op(MI, -1)->shift.type = (arm_shifter)ShOpc;

  if (ShOpc != ARM_AM_rrx) {
    if (doing_mem(MI))
      ARM_get_detail_op(MI, 0)->shift.value =
        translateShiftImm(ShImm);
    else
      ARM_get_detail_op(MI, -1)->shift.value =
        translateShiftImm(ShImm);
  }
}

/// Fills cs_detail with the data of the operand.
/// This function handles operands which's original printer function has no
/// specialities.
static void add_cs_detail_general(MCInst *MI, arm_op_group op_group,
          unsigned OpNum)
{
  if (!detail_is_set(MI))
    return;
  cs_op_type op_type = map_get_op_type(MI, OpNum);

  // Fill cs_detail
  switch (op_group) {
  default:
    printf("ERROR: Operand group %d not handled!\n", op_group);
    CS_ASSERT_RET(0);
  case ARM_OP_GROUP_PredicateOperand:
  case ARM_OP_GROUP_MandatoryPredicateOperand:
  case ARM_OP_GROUP_MandatoryInvertedPredicateOperand:
  case ARM_OP_GROUP_MandatoryRestrictedPredicateOperand: {
    ARMCC_CondCodes CC = (ARMCC_CondCodes)MCOperand_getImm(
      MCInst_getOperand(MI, OpNum));
    if ((unsigned)CC == 15 &&
        op_group == ARM_OP_GROUP_PredicateOperand) {
      ARM_get_detail(MI)->cc = ARMCC_UNDEF;
      return;
    }
    if (CC == ARMCC_HS &&
        op_group ==
          ARM_OP_GROUP_MandatoryRestrictedPredicateOperand) {
      ARM_get_detail(MI)->cc = ARMCC_HS;
      return;
    }
    ARM_get_detail(MI)->cc = CC;
    if (CC != ARMCC_AL)
      map_add_implicit_read(MI, ARM_REG_CPSR);
    break;
  }
  case ARM_OP_GROUP_VPTPredicateOperand: {
    ARMVCC_VPTCodes VCC = (ARMVCC_VPTCodes)MCOperand_getImm(
      MCInst_getOperand(MI, OpNum));
    CS_ASSERT_RET(VCC <= ARMVCC_Else);
    if (VCC != ARMVCC_None)
      ARM_get_detail(MI)->vcc = VCC;
    break;
  }
  case ARM_OP_GROUP_Operand:
    if (op_type == CS_OP_IMM) {
      if (doing_mem(MI)) {
        ARM_set_detail_op_mem(MI, OpNum, false, 0,
                  MCInst_getOpVal(MI,
                      OpNum));
      } else {
        ARM_set_detail_op_imm(
          MI, OpNum, ARM_OP_IMM,
          t_add_pc(MI,
             MCInst_getOpVal(MI, OpNum)));
      }
    } else if (op_type == CS_OP_REG)
      if (doing_mem(MI)) {
        bool is_index_reg = map_get_op_type(MI, OpNum) &
                CS_OP_MEM;
        ARM_set_detail_op_mem(MI, OpNum, is_index_reg,
                  is_index_reg ? 1 : 0,
                  MCInst_getOpVal(MI,
                      OpNum));
      } else {
        ARM_set_detail_op_reg(
          MI, OpNum, MCInst_getOpVal(MI, OpNum));
      }
    else
      CS_ASSERT_RET(0 && "Op type not handled.");
    break;
  case ARM_OP_GROUP_PImmediate:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_PIMM,
              MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_CImmediate:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_CIMM,
              MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_AddrMode6Operand:
    if (!doing_mem(MI))
      ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    ARM_get_detail_op(MI, 0)->mem.align =
      MCInst_getOpVal(MI, OpNum + 1) << 3;
    ARM_set_mem_access(MI, false);
    break;
  case ARM_OP_GROUP_AddrMode6OffsetOperand: {
    arm_reg reg = MCInst_getOpVal(MI, OpNum);
    if (reg != 0) {
      ARM_set_detail_op_mem_offset(MI, OpNum, reg, false);
    }
    break;
  }
  case ARM_OP_GROUP_AddrMode7Operand:
    if (!doing_mem(MI))
      ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    ARM_set_mem_access(MI, false);
    break;
  case ARM_OP_GROUP_SBitModifierOperand: {
    unsigned SBit = MCInst_getOpVal(MI, OpNum);

    if (SBit == 0) {
      // Does not edit set flags.
      map_remove_implicit_write(MI, ARM_CPSR);
      ARM_get_detail(MI)->update_flags = false;
      break;
    }
    // Add the implicit write again. Some instruction miss it.
    map_add_implicit_write(MI, ARM_CPSR);
    ARM_get_detail(MI)->update_flags = true;
    break;
  }
  case ARM_OP_GROUP_VectorListOne:
  case ARM_OP_GROUP_VectorListOneAllLanes:
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 0));
    break;
  case ARM_OP_GROUP_VectorListTwo:
  case ARM_OP_GROUP_VectorListTwoAllLanes: {
    unsigned Reg = MCInst_getOpVal(MI, OpNum);
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_dsub_0));
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_dsub_1));
    break;
  }
  case ARM_OP_GROUP_VectorListTwoSpacedAllLanes:
  case ARM_OP_GROUP_VectorListTwoSpaced: {
    unsigned Reg = MCInst_getOpVal(MI, OpNum);
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_dsub_0));
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_dsub_2));
    break;
  }
  case ARM_OP_GROUP_VectorListThree:
  case ARM_OP_GROUP_VectorListThreeAllLanes:
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 0));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 1));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 2));
    break;
  case ARM_OP_GROUP_VectorListThreeSpacedAllLanes:
  case ARM_OP_GROUP_VectorListThreeSpaced:
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 0));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 2));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 4));
    break;
  case ARM_OP_GROUP_VectorListFour:
  case ARM_OP_GROUP_VectorListFourAllLanes:
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 0));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 1));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 2));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 3));
    break;
  case ARM_OP_GROUP_VectorListFourSpacedAllLanes:
  case ARM_OP_GROUP_VectorListFourSpaced:
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 0));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 2));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 4));
    ARM_set_detail_op_reg(MI, OpNum,
              t_qpr_to_dpr_list(MI, OpNum, 6));
    break;
  case ARM_OP_GROUP_NoHashImmediate:
    ARM_set_detail_op_neon_lane(MI, OpNum);
    break;
  case ARM_OP_GROUP_RegisterList: {
    // All operands n MI from OpNum on are registers.
    // But the MappingInsnOps.inc has only a single entry for the whole
    // list. So all registers in the list share those attributes.
    unsigned access = map_get_op_access(MI, OpNum);
    for (unsigned i = OpNum, e = MCInst_getNumOperands(MI); i != e;
         ++i) {
      unsigned Reg =
        MCOperand_getReg(MCInst_getOperand(MI, i));

      ARM_check_safe_inc(MI);
      ARM_get_detail_op(MI, 0)->type = ARM_OP_REG;
      ARM_get_detail_op(MI, 0)->reg = Reg;
      ARM_get_detail_op(MI, 0)->access = access;
      ARM_inc_op_count(MI);
    }
    break;
  }
  case ARM_OP_GROUP_ThumbITMask: {
    unsigned Mask = MCInst_getOpVal(MI, OpNum);
    unsigned Firstcond = MCInst_getOpVal(MI, OpNum - 1);
    unsigned CondBit0 = Firstcond & 1;
    unsigned NumTZ = CountTrailingZeros_32(Mask);
    unsigned Pos, e;
    ARM_PredBlockMask PredMask = ARM_PredBlockMaskInvalid;

    // Check the documentation of ARM_PredBlockMask how the bits are set.
    for (Pos = 3, e = NumTZ; Pos > e; --Pos) {
      bool Then = ((Mask >> Pos) & 1) == CondBit0;
      if (Then)
        PredMask <<= 1;
      else {
        PredMask |= 1;
        PredMask <<= 1;
      }
    }
    PredMask |= 1;
    ARM_get_detail(MI)->pred_mask = PredMask;
    break;
  }
  case ARM_OP_GROUP_VPTMask: {
    unsigned Mask = MCInst_getOpVal(MI, OpNum);
    unsigned NumTZ = CountTrailingZeros_32(Mask);
    ARM_PredBlockMask PredMask = ARM_PredBlockMaskInvalid;

    // Check the documentation of ARM_PredBlockMask how the bits are set.
    for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
      bool T = ((Mask >> Pos) & 1) == 0;
      if (T)
        PredMask <<= 1;
      else {
        PredMask |= 1;
        PredMask <<= 1;
      }
    }
    PredMask |= 1;
    ARM_get_detail(MI)->pred_mask = PredMask;
    break;
  }
  case ARM_OP_GROUP_MSRMaskOperand: {
    MCOperand *Op = MCInst_getOperand(MI, OpNum);
    unsigned SpecRegRBit = (unsigned)MCOperand_getImm(Op) >> 4;
    unsigned Mask = (unsigned)MCOperand_getImm(Op) & 0xf;
    bool IsOutReg = OpNum == 0;

    if (ARM_getFeatureBits(MI->csh->mode, ARM_FeatureMClass)) {
      const ARMSysReg_MClassSysReg *TheReg;
      unsigned SYSm = (unsigned)MCOperand_getImm(Op) &
          0xFFF; // 12-bit SYMm
      unsigned Opcode = MCInst_getOpcode(MI);

      if (Opcode == ARM_t2MSR_M &&
          ARM_getFeatureBits(MI->csh->mode, ARM_FeatureDSP)) {
        TheReg =
          ARMSysReg_lookupMClassSysRegBy12bitSYSmValue(
            SYSm);
        if (TheReg && MClassSysReg_isInRequiredFeatures(
                  TheReg, ARM_FeatureDSP)) {
          ARM_set_detail_op_sysop(
            MI, TheReg->sysreg.mclasssysreg,
            ARM_OP_SYSREG, IsOutReg, Mask,
            SYSm);
          return;
        }
      }

      SYSm &= 0xff;
      if (Opcode == ARM_t2MSR_M &&
          ARM_getFeatureBits(MI->csh->mode, ARM_HasV7Ops)) {
        TheReg =
          ARMSysReg_lookupMClassSysRegAPSRNonDeprecated(
            SYSm);
        if (TheReg) {
          ARM_set_detail_op_sysop(
            MI, TheReg->sysreg.mclasssysreg,
            ARM_OP_SYSREG, IsOutReg, Mask,
            SYSm);
          return;
        }
      }

      TheReg = ARMSysReg_lookupMClassSysRegBy8bitSYSmValue(
        SYSm);
      if (TheReg) {
        ARM_set_detail_op_sysop(
          MI, TheReg->sysreg.mclasssysreg,
          ARM_OP_SYSREG, IsOutReg, Mask, SYSm);
        return;
      }

      if (detail_is_set(MI))
        MCOperand_CreateImm0(MI, SYSm);

      ARM_set_detail_op_sysop(MI, SYSm, ARM_OP_SYSREG,
            IsOutReg, Mask, SYSm);

      return;
    }

    if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
      switch (Mask) {
      default:
        CS_ASSERT_RET(0 && "Unexpected mask value!");
      case 4:
        ARM_set_detail_op_sysop(MI,
              ARM_MCLASSSYSREG_APSR_G,
              ARM_OP_SYSREG, IsOutReg,
              Mask, UINT16_MAX);
        return;
      case 8:
        ARM_set_detail_op_sysop(
          MI, ARM_MCLASSSYSREG_APSR_NZCVQ,
          ARM_OP_SYSREG, IsOutReg, Mask,
          UINT16_MAX);
        return;
      case 12:
        ARM_set_detail_op_sysop(
          MI, ARM_MCLASSSYSREG_APSR_NZCVQG,
          ARM_OP_SYSREG, IsOutReg, Mask,
          UINT16_MAX);
        return;
      }
    }

    unsigned field = 0;
    if (Mask) {
      if (Mask & 8)
        field += SpecRegRBit ? ARM_FIELD_SPSR_F :
                   ARM_FIELD_CPSR_F;
      if (Mask & 4)
        field += SpecRegRBit ? ARM_FIELD_SPSR_S :
                   ARM_FIELD_CPSR_S;
      if (Mask & 2)
        field += SpecRegRBit ? ARM_FIELD_SPSR_X :
                   ARM_FIELD_CPSR_X;
      if (Mask & 1)
        field += SpecRegRBit ? ARM_FIELD_SPSR_C :
                   ARM_FIELD_CPSR_C;

      ARM_set_detail_op_sysop(MI, field,
            SpecRegRBit ? ARM_OP_SPSR :
                    ARM_OP_CPSR,
            IsOutReg, Mask, UINT16_MAX);
    }
    break;
  }
  case ARM_OP_GROUP_SORegRegOperand: {
    int64_t imm =
      MCOperand_getImm(MCInst_getOperand(MI, OpNum + 2));
    ARM_get_detail_op(MI, 0)->shift.type =
      ARM_AM_getSORegShOp(imm) + ARM_SFT_REG;
    if (ARM_AM_getSORegShOp(imm) != ARM_AM_rrx)
      ARM_get_detail_op(MI, 0)->shift.value =
        MCInst_getOpVal(MI, OpNum + 1);

    ARM_set_detail_op_reg(MI, OpNum, MCInst_getOpVal(MI, OpNum));
    break;
  }
  case ARM_OP_GROUP_ModImmOperand: {
    int64_t imm = MCInst_getOpVal(MI, OpNum);
    int32_t Rotated = t_mod_imm_rotate(imm);
    if (ARM_AM_getSOImmVal(Rotated) == imm) {
      ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
                t_mod_imm_rotate(imm));
      return;
    }
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              t_mod_imm_bits(imm));
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              t_mod_imm_rot(imm));
    break;
  }
  case ARM_OP_GROUP_VMOVModImmOperand:
    ARM_set_detail_op_imm(
      MI, OpNum, ARM_OP_IMM,
      t_vmov_mod_imm(MCInst_getOpVal(MI, OpNum)));
    break;
  case ARM_OP_GROUP_FPImmOperand:
    ARM_set_detail_op_float(MI, OpNum, MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_ImmPlusOneOperand:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              MCInst_getOpVal(MI, OpNum) + 1);
    break;
  case ARM_OP_GROUP_RotImmOperand: {
    unsigned RotImm = MCInst_getOpVal(MI, OpNum);
    if (RotImm == 0)
      return;
    ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_ROR;
    ARM_get_detail_op(MI, -1)->shift.value = RotImm * 8;
    break;
  }
  case ARM_OP_GROUP_FBits16:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              16 - MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_FBits32:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              32 - MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_T2SOOperand:
  case ARM_OP_GROUP_SORegImmOperand:
    ARM_set_detail_op_reg(MI, OpNum, MCInst_getOpVal(MI, OpNum));
    uint64_t imm = MCInst_getOpVal(MI, OpNum + 1);
    ARM_AM_ShiftOpc ShOpc = ARM_AM_getSORegShOp(imm);
    unsigned ShImm = ARM_AM_getSORegOffset(imm);
    if (op_group == ARM_OP_GROUP_SORegImmOperand) {
      if (ShOpc == ARM_AM_no_shift ||
          (ShOpc == ARM_AM_lsl && !ShImm))
        return;
    }
    add_cs_detail_RegImmShift(MI, ShOpc, ShImm);
    break;
  case ARM_OP_GROUP_PostIdxRegOperand: {
    bool sub = MCInst_getOpVal(MI, OpNum + 1) ? false : true;
    ARM_set_detail_op_mem_offset(MI, OpNum,
               MCInst_getOpVal(MI, OpNum), sub);
    ARM_get_detail(MI)->post_index = true;
    break;
  }
  case ARM_OP_GROUP_PostIdxImm8Operand: {
    unsigned Imm8 = MCInst_getOpVal(MI, OpNum);
    bool sub = !(Imm8 & 256);
    ARM_set_detail_op_mem_offset(MI, OpNum, (Imm8 & 0xff), sub);
    ARM_get_detail(MI)->post_index = true;
    break;
  }
  case ARM_OP_GROUP_PostIdxImm8s4Operand: {
    unsigned Imm8s = MCInst_getOpVal(MI, OpNum);
    bool sub = !(Imm8s & 256);
    ARM_set_detail_op_mem_offset(MI, OpNum, (Imm8s & 0xff) << 2,
               sub);
    ARM_get_detail(MI)->post_index = true;
    break;
  }
  case ARM_OP_GROUP_AddrModeTBB:
  case ARM_OP_GROUP_AddrModeTBH:
    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    ARM_set_detail_op_mem(MI, OpNum + 1, true, 1,
              MCInst_getOpVal(MI, OpNum + 1));
    if (op_group == ARM_OP_GROUP_AddrModeTBH) {
      ARM_get_detail_op(MI, 0)->shift.type = ARM_SFT_LSL;
      ARM_get_detail_op(MI, 0)->shift.value = 1;
    }
    ARM_set_mem_access(MI, false);
    break;
  case ARM_OP_GROUP_AddrMode2Operand: {
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    if (!MCOperand_isReg(MO1))
      // Handled in printOperand
      break;

    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    unsigned int imm3 = MCInst_getOpVal(MI, OpNum + 2);
    unsigned ShOff = ARM_AM_getAM2Offset(imm3);
    ARM_AM_AddrOpc subtracted = ARM_AM_getAM2Op(imm3);
    if (!MCOperand_getReg(MCInst_getOperand(MI, OpNum + 1)) &&
        ShOff) {
      ARM_get_detail_op(MI, 0)->shift.value = ShOff;
      ARM_get_detail_op(MI, 0)->subtracted = subtracted ==
                     ARM_AM_sub;
      ARM_set_mem_access(MI, false);
      break;
    }
    ARM_set_detail_op_mem(MI, OpNum + 1, true,
              subtracted == ARM_AM_sub ? -1 : 1,
              MCInst_getOpVal(MI, OpNum + 1));
    add_cs_detail_RegImmShift(MI, ARM_AM_getAM2ShiftOpc(imm3),
            ARM_AM_getAM2Offset(imm3));
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_AddrMode2OffsetOperand: {
    uint64_t imm2 = MCInst_getOpVal(MI, OpNum + 1);
    ARM_AM_AddrOpc subtracted = ARM_AM_getAM2Op(imm2);
    if (!MCInst_getOpVal(MI, OpNum)) {
      ARM_set_detail_op_mem_offset(MI, OpNum + 1,
                 ARM_AM_getAM2Offset(imm2),
                 subtracted == ARM_AM_sub);
      ARM_get_detail(MI)->post_index = true;
      return;
    }
    ARM_set_detail_op_mem_offset(MI, OpNum,
               MCInst_getOpVal(MI, OpNum),
               subtracted == ARM_AM_sub);
    ARM_get_detail(MI)->post_index = true;
    add_cs_detail_RegImmShift(MI, ARM_AM_getAM2ShiftOpc(imm2),
            ARM_AM_getAM2Offset(imm2));
    break;
  }
  case ARM_OP_GROUP_AddrMode3OffsetOperand: {
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    MCOperand *MO2 = MCInst_getOperand(MI, OpNum + 1);
    ARM_AM_AddrOpc subtracted =
      ARM_AM_getAM3Op(MCOperand_getImm(MO2));
    if (MCOperand_getReg(MO1)) {
      ARM_set_detail_op_mem_offset(MI, OpNum,
                 MCInst_getOpVal(MI, OpNum),
                 subtracted == ARM_AM_sub);
      ARM_get_detail(MI)->post_index = true;
      return;
    }
    ARM_set_detail_op_mem_offset(
      MI, OpNum + 1,
      ARM_AM_getAM3Offset(MCInst_getOpVal(MI, OpNum + 1)),
      subtracted == ARM_AM_sub);
    ARM_get_detail(MI)->post_index = true;
    break;
  }
  case ARM_OP_GROUP_ThumbAddrModeSPOperand:
  case ARM_OP_GROUP_ThumbAddrModeImm5S1Operand:
  case ARM_OP_GROUP_ThumbAddrModeImm5S2Operand:
  case ARM_OP_GROUP_ThumbAddrModeImm5S4Operand: {
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    if (!MCOperand_isReg(MO1))
      // Handled in printOperand
      break;

    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    unsigned ImmOffs = MCInst_getOpVal(MI, OpNum + 1);
    if (ImmOffs) {
      unsigned Scale = 0;
      switch (op_group) {
      default:
        CS_ASSERT_RET(
          0 &&
          "Cannot determine scale. Operand group not handled.");
      case ARM_OP_GROUP_ThumbAddrModeImm5S1Operand:
        Scale = 1;
        break;
      case ARM_OP_GROUP_ThumbAddrModeImm5S2Operand:
        Scale = 2;
        break;
      case ARM_OP_GROUP_ThumbAddrModeImm5S4Operand:
      case ARM_OP_GROUP_ThumbAddrModeSPOperand:
        Scale = 4;
        break;
      }
      ARM_set_detail_op_mem(MI, OpNum + 1, false, 0,
                ImmOffs * Scale);
    }
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_ThumbAddrModeRROperand: {
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    if (!MCOperand_isReg(MO1))
      // Handled in printOperand
      break;

    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    arm_reg RegNum = MCInst_getOpVal(MI, OpNum + 1);
    if (RegNum)
      ARM_set_detail_op_mem(MI, OpNum + 1, true, 1, RegNum);
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_T2AddrModeImm8OffsetOperand:
  case ARM_OP_GROUP_T2AddrModeImm8s4OffsetOperand: {
    int32_t OffImm = MCInst_getOpVal(MI, OpNum);
    if (OffImm == INT32_MIN)
      ARM_set_detail_op_mem_offset(MI, OpNum, 0, false);
    else {
      bool sub = OffImm < 0;
      OffImm = OffImm < 0 ? OffImm * -1 : OffImm;
      ARM_set_detail_op_mem_offset(MI, OpNum, OffImm, sub);
    }
    ARM_get_detail(MI)->post_index = true;
    break;
  }
  case ARM_OP_GROUP_T2AddrModeSoRegOperand: {
    if (!doing_mem(MI))
      ARM_set_mem_access(MI, true);

    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    ARM_set_detail_op_mem(MI, OpNum + 1, true, 1,
              MCInst_getOpVal(MI, OpNum + 1));
    unsigned ShAmt = MCInst_getOpVal(MI, OpNum + 2);
    if (ShAmt) {
      ARM_get_detail_op(MI, 0)->shift.type = ARM_SFT_LSL;
      ARM_get_detail_op(MI, 0)->shift.value = ShAmt;
    }
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_T2AddrModeImm0_1020s4Operand:
    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    int64_t Imm0_1024s4 = MCInst_getOpVal(MI, OpNum + 1);
    if (Imm0_1024s4)
      ARM_set_detail_op_mem(MI, OpNum + 1, false, 0,
                Imm0_1024s4 * 4);
    ARM_set_mem_access(MI, false);
    break;
  case ARM_OP_GROUP_PKHLSLShiftImm: {
    unsigned ShiftImm = MCInst_getOpVal(MI, OpNum);
    if (ShiftImm == 0)
      return;
    ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_LSL;
    ARM_get_detail_op(MI, -1)->shift.value = ShiftImm;
    break;
  }
  case ARM_OP_GROUP_PKHASRShiftImm: {
    unsigned RShiftImm = MCInst_getOpVal(MI, OpNum);
    if (RShiftImm == 0)
      RShiftImm = 32;
    ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_ASR;
    ARM_get_detail_op(MI, -1)->shift.value = RShiftImm;
    break;
  }
  case ARM_OP_GROUP_ThumbS4ImmOperand:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              MCInst_getOpVal(MI, OpNum) * 4);
    break;
  case ARM_OP_GROUP_ThumbSRImm: {
    unsigned SRImm = MCInst_getOpVal(MI, OpNum);
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              SRImm == 0 ? 32 : SRImm);
    break;
  }
  case ARM_OP_GROUP_BitfieldInvMaskImmOperand: {
    uint32_t v = ~MCInst_getOpVal(MI, OpNum);
    int32_t lsb = CountTrailingZeros_32(v);
    int32_t width = (32 - countLeadingZeros(v)) - lsb;
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM, lsb);
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM, width);
    break;
  }
  case ARM_OP_GROUP_CPSIMod: {
    unsigned Mode = MCInst_getOpVal(MI, OpNum);
    ARM_get_detail(MI)->cps_mode = Mode;
    break;
  }
  case ARM_OP_GROUP_CPSIFlag: {
    unsigned IFlags = MCInst_getOpVal(MI, OpNum);
    ARM_get_detail(MI)->cps_flag = IFlags == 0 ? ARM_CPSFLAG_NONE :
                   IFlags;
    break;
  }
  case ARM_OP_GROUP_GPRPairOperand: {
    unsigned Reg = MCInst_getOpVal(MI, OpNum);
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_gsub_0));
    ARM_set_detail_op_reg(MI, OpNum,
              MCRegisterInfo_getSubReg(MI->MRI, Reg,
                     ARM_gsub_1));
    break;
  }
  case ARM_OP_GROUP_MemBOption:
  case ARM_OP_GROUP_InstSyncBOption:
  case ARM_OP_GROUP_TraceSyncBOption:
    ARM_get_detail(MI)->mem_barrier = MCInst_getOpVal(MI, OpNum);
    break;
  case ARM_OP_GROUP_ShiftImmOperand: {
    unsigned ShiftOp = MCInst_getOpVal(MI, OpNum);
    bool isASR = (ShiftOp & (1 << 5)) != 0;
    unsigned Amt = ShiftOp & 0x1f;
    if (isASR) {
      unsigned tmp = Amt == 0 ? 32 : Amt;
      ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_ASR;
      ARM_get_detail_op(MI, -1)->shift.value = tmp;
    } else if (Amt) {
      ARM_get_detail_op(MI, -1)->shift.type = ARM_SFT_LSL;
      ARM_get_detail_op(MI, -1)->shift.value = Amt;
    }
    break;
  }
  case ARM_OP_GROUP_VectorIndex:
    ARM_get_detail_op(MI, -1)->vector_index =
      MCInst_getOpVal(MI, OpNum);
    break;
  case ARM_OP_GROUP_CoprocOptionImm:
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM,
              MCInst_getOpVal(MI, OpNum));
    break;
  case ARM_OP_GROUP_ThumbLdrLabelOperand: {
    int32_t OffImm = MCInst_getOpVal(MI, OpNum);
    if (OffImm == INT32_MIN)
      OffImm = 0;
    ARM_check_safe_inc(MI);
    ARM_get_detail_op(MI, 0)->type = ARM_OP_MEM;
    ARM_get_detail_op(MI, 0)->mem.base = ARM_REG_PC;
    ARM_get_detail_op(MI, 0)->mem.index = ARM_REG_INVALID;
    ARM_get_detail_op(MI, 0)->mem.scale = 1;
    ARM_get_detail_op(MI, 0)->mem.disp = OffImm;
    ARM_get_detail_op(MI, 0)->access = CS_AC_READ;
    ARM_inc_op_count(MI);
    break;
  }
  case ARM_OP_GROUP_BankedRegOperand: {
    uint32_t Banked = MCInst_getOpVal(MI, OpNum);
    const ARMBankedReg_BankedReg *TheReg =
      ARMBankedReg_lookupBankedRegByEncoding(Banked);
    bool IsOutReg = OpNum == 0;
    ARM_set_detail_op_sysop(MI, TheReg->sysreg.bankedreg,
          ARM_OP_BANKEDREG, IsOutReg, UINT8_MAX,
          TheReg->Encoding &
            0xf); // Bit[4:0] are SYSm
    break;
  }
  case ARM_OP_GROUP_SetendOperand: {
    bool be = MCInst_getOpVal(MI, OpNum) != 0;
    ARM_check_safe_inc(MI);
    if (be) {
      ARM_get_detail_op(MI, 0)->type = ARM_OP_SETEND;
      ARM_get_detail_op(MI, 0)->setend = ARM_SETEND_BE;
    } else {
      ARM_get_detail_op(MI, 0)->type = ARM_OP_SETEND;
      ARM_get_detail_op(MI, 0)->setend = ARM_SETEND_LE;
    }
    ARM_inc_op_count(MI);
    break;
  }
  case ARM_OP_GROUP_MveSaturateOp: {
    uint32_t Val = MCInst_getOpVal(MI, OpNum);
    Val = Val == 1 ? 48 : 64;
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM, Val);
    break;
  }
  }
}

/// Fills cs_detail with the data of the operand.
/// This function handles operands which original printer function is a template
/// with one argument.
static void add_cs_detail_template_1(MCInst *MI, arm_op_group op_group,
             unsigned OpNum, uint64_t temp_arg_0)
{
  if (!detail_is_set(MI))
    return;
  switch (op_group) {
  default:
    printf("ERROR: Operand group %d not handled!\n", op_group);
    CS_ASSERT_RET(0);
  case ARM_OP_GROUP_AddrModeImm12Operand_0:
  case ARM_OP_GROUP_AddrModeImm12Operand_1:
  case ARM_OP_GROUP_T2AddrModeImm8s4Operand_0:
  case ARM_OP_GROUP_T2AddrModeImm8s4Operand_1: {
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    if (!MCOperand_isReg(MO1))
      // Handled in printOperand
      return;
  }
  // fallthrough
  case ARM_OP_GROUP_T2AddrModeImm8Operand_0:
  case ARM_OP_GROUP_T2AddrModeImm8Operand_1: {
    bool AlwaysPrintImm0 = temp_arg_0;
    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    int32_t Imm8 = MCInst_getOpVal(MI, OpNum + 1);
    if (Imm8 == INT32_MIN)
      Imm8 = 0;
    ARM_set_detail_op_mem(MI, OpNum + 1, false, 0, Imm8);
    if (AlwaysPrintImm0)
      map_add_implicit_write(MI, MCInst_getOpVal(MI, OpNum));

    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_AdrLabelOperand_0:
  case ARM_OP_GROUP_AdrLabelOperand_2: {
    unsigned Scale = temp_arg_0;
    int32_t OffImm = MCInst_getOpVal(MI, OpNum) << Scale;
    if (OffImm == INT32_MIN)
      OffImm = 0;
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM, OffImm);
    break;
  }
  case ARM_OP_GROUP_AddrMode3Operand_0:
  case ARM_OP_GROUP_AddrMode3Operand_1: {
    bool AlwaysPrintImm0 = temp_arg_0;
    MCOperand *MO1 = MCInst_getOperand(MI, OpNum);
    if (!MCOperand_isReg(MO1))
      // Handled in printOperand
      break;

    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));

    MCOperand *MO2 = MCInst_getOperand(MI, OpNum + 1);
    ARM_AM_AddrOpc Sign =
      ARM_AM_getAM3Op(MCInst_getOpVal(MI, OpNum + 2));

    if (MCOperand_getReg(MO2)) {
      ARM_set_detail_op_mem(MI, OpNum + 1, true,
                Sign == ARM_AM_sub ? -1 : 1,
                MCInst_getOpVal(MI, OpNum + 1));
      ARM_get_detail_op(MI, 0)->subtracted = Sign ==
                     ARM_AM_sub;
      ARM_set_mem_access(MI, false);
      break;
    }
    unsigned ImmOffs =
      ARM_AM_getAM3Offset(MCInst_getOpVal(MI, OpNum + 2));

    if (AlwaysPrintImm0 || ImmOffs || Sign == ARM_AM_sub) {
      ARM_set_detail_op_mem(MI, OpNum + 2, false, 0, ImmOffs);
      ARM_get_detail_op(MI, 0)->subtracted = Sign ==
                     ARM_AM_sub;
    }
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_AddrMode5Operand_0:
  case ARM_OP_GROUP_AddrMode5Operand_1:
  case ARM_OP_GROUP_AddrMode5FP16Operand_0: {
    bool AlwaysPrintImm0 = temp_arg_0;

    if (AlwaysPrintImm0) {
      get_detail(MI)->writeback = true;
      map_add_implicit_write(MI, MCInst_getOpVal(MI, OpNum));
    }

    ARM_check_safe_inc(MI);
    cs_arm_op *Op = ARM_get_detail_op(MI, 0);
    Op->type = ARM_OP_MEM;
    Op->mem.base = MCInst_getOpVal(MI, OpNum);
    Op->mem.index = ARM_REG_INVALID;
    Op->mem.scale = 1;
    Op->mem.disp = 0;
    Op->access = CS_AC_READ;

    ARM_AM_AddrOpc SubFlag =
      ARM_AM_getAM5Op(MCInst_getOpVal(MI, OpNum + 1));
    unsigned ImmOffs =
      ARM_AM_getAM5Offset(MCInst_getOpVal(MI, OpNum + 1));

    if (AlwaysPrintImm0 || ImmOffs || SubFlag == ARM_AM_sub) {
      if (op_group == ARM_OP_GROUP_AddrMode5FP16Operand_0) {
        Op->mem.disp = ImmOffs * 2;
      } else {
        Op->mem.disp = ImmOffs * 4;
      }
      Op->subtracted = SubFlag == ARM_AM_sub;
    }
    ARM_inc_op_count(MI);
    break;
  }
  case ARM_OP_GROUP_MveAddrModeRQOperand_0:
  case ARM_OP_GROUP_MveAddrModeRQOperand_1:
  case ARM_OP_GROUP_MveAddrModeRQOperand_2:
  case ARM_OP_GROUP_MveAddrModeRQOperand_3: {
    unsigned Shift = temp_arg_0;
    ARM_set_mem_access(MI, true);
    ARM_set_detail_op_mem(MI, OpNum, false, 0,
              MCInst_getOpVal(MI, OpNum));
    ARM_set_detail_op_mem(MI, OpNum + 1, true, 1,
              MCInst_getOpVal(MI, OpNum + 1));
    if (Shift > 0) {
      add_cs_detail_RegImmShift(MI, ARM_AM_uxtw, Shift);
    }
    ARM_set_mem_access(MI, false);
    break;
  }
  case ARM_OP_GROUP_MVEVectorList_2:
  case ARM_OP_GROUP_MVEVectorList_4: {
    unsigned NumRegs = temp_arg_0;
    arm_reg Reg = MCInst_getOpVal(MI, OpNum);
    for (unsigned i = 0; i < NumRegs; ++i) {
      arm_reg SubReg = MCRegisterInfo_getSubReg(
        MI->MRI, Reg, ARM_qsub_0 + i);
      ARM_set_detail_op_reg(MI, OpNum, SubReg);
    }
    break;
  }
  }
}

/// Fills cs_detail with the data of the operand.
/// This function handles operands which's original printer function is a
/// template with two arguments.
static void add_cs_detail_template_2(MCInst *MI, arm_op_group op_group,
             unsigned OpNum, uint64_t temp_arg_0,
             uint64_t temp_arg_1)
{
  if (!detail_is_set(MI))
    return;
  switch (op_group) {
  default:
    printf("ERROR: Operand group %d not handled!\n", op_group);
    CS_ASSERT_RET(0);
  case ARM_OP_GROUP_ComplexRotationOp_90_0:
  case ARM_OP_GROUP_ComplexRotationOp_180_90: {
    unsigned Angle = temp_arg_0;
    unsigned Remainder = temp_arg_1;
    unsigned Rotation =
      (MCInst_getOpVal(MI, OpNum) * Angle) + Remainder;
    ARM_set_detail_op_imm(MI, OpNum, ARM_OP_IMM, Rotation);
    break;
  }
  }
}

/// Fills cs_detail with the data of the operand.
/// Calls to this function are should not be added by hand! Please checkout the
/// patch `AddCSDetail` of the CppTranslator.
static void ARM_add_cs_detail(MCInst *MI, int /* arm_op_group */ op_group,
            size_t op_num, uint64_t templ_arg_0,
            uint64_t templ_arg_1)
{
  if (!detail_is_set(MI) || !map_fill_detail_ops(MI))
    return;
  switch (op_group) {
  case ARM_OP_GROUP_RegImmShift: {
    ARM_AM_ShiftOpc shift_opc = (ARM_AM_ShiftOpc)templ_arg_0;
    unsigned shift_imm = templ_arg_1;
    add_cs_detail_RegImmShift(MI, shift_opc, shift_imm);
    return;
  }
  case ARM_OP_GROUP_AdrLabelOperand_0:
  case ARM_OP_GROUP_AdrLabelOperand_2:
  case ARM_OP_GROUP_AddrMode3Operand_0:
  case ARM_OP_GROUP_AddrMode3Operand_1:
  case ARM_OP_GROUP_AddrMode5Operand_0:
  case ARM_OP_GROUP_AddrMode5Operand_1:
  case ARM_OP_GROUP_AddrModeImm12Operand_0:
  case ARM_OP_GROUP_AddrModeImm12Operand_1:
  case ARM_OP_GROUP_T2AddrModeImm8Operand_0:
  case ARM_OP_GROUP_T2AddrModeImm8Operand_1:
  case ARM_OP_GROUP_T2AddrModeImm8s4Operand_0:
  case ARM_OP_GROUP_T2AddrModeImm8s4Operand_1:
  case ARM_OP_GROUP_MVEVectorList_2:
  case ARM_OP_GROUP_MVEVectorList_4:
  case ARM_OP_GROUP_AddrMode5FP16Operand_0:
  case ARM_OP_GROUP_MveAddrModeRQOperand_0:
  case ARM_OP_GROUP_MveAddrModeRQOperand_3:
  case ARM_OP_GROUP_MveAddrModeRQOperand_1:
  case ARM_OP_GROUP_MveAddrModeRQOperand_2: {
    add_cs_detail_template_1(MI, op_group, op_num, templ_arg_0);
    return;
  }
  case ARM_OP_GROUP_ComplexRotationOp_180_90:
  case ARM_OP_GROUP_ComplexRotationOp_90_0: {
    add_cs_detail_template_2(MI, op_group, op_num, templ_arg_0,
           templ_arg_1);
    return;
  }
  }
  add_cs_detail_general(MI, op_group, op_num);
}

void ARM_add_cs_detail_0(MCInst *MI, int /* arm_op_group */ op_group,
       size_t op_num)
{
  ARM_add_cs_detail(MI, op_group, op_num, 0, 0);
}

void ARM_add_cs_detail_1(MCInst *MI, int /* arm_op_group */ op_group,
       size_t op_num, uint64_t templ_arg_0)
{
  ARM_add_cs_detail(MI, op_group, op_num, templ_arg_0, 0);
}

void ARM_add_cs_detail_2(MCInst *MI, int /* arm_op_group */ op_group,
       size_t op_num, uint64_t templ_arg_0,
       uint64_t templ_arg_1)
{
  ARM_add_cs_detail(MI, op_group, op_num, templ_arg_0, templ_arg_1);
}

static void insert_op(MCInst *MI, unsigned index, cs_arm_op op)
{
  if (!detail_is_set(MI)) {
    return;
  }
  ARM_check_safe_inc(MI);

  cs_arm_op *ops = ARM_get_detail(MI)->operands;
  int i = ARM_get_detail(MI)->op_count;
  if (index == -1) {
    ops[i] = op;
    ARM_inc_op_count(MI);
    return;
  }
  for (; i > 0 && i > index; --i) {
    ops[i] = ops[i - 1];
  }
  ops[index] = op;
  ARM_inc_op_count(MI);
}

/// Inserts a register to the detail operands at @index.
/// Already present operands are moved.
/// If @index is -1 the operand is appended.
void ARM_insert_detail_op_reg_at(MCInst *MI, unsigned index, arm_reg Reg,
         cs_ac_type access)
{
  if (!detail_is_set(MI))
    return;

  cs_arm_op op;
  ARM_setup_op(&op);
  op.type = ARM_OP_REG;
  op.reg = Reg;
  op.access = access;
  insert_op(MI, index, op);
}

/// Inserts a immediate to the detail operands at @index.
/// Already present operands are moved.
/// If @index is -1 the operand is appended.
void ARM_insert_detail_op_imm_at(MCInst *MI, unsigned index, int64_t Val,
         cs_ac_type access)
{
  if (!detail_is_set(MI))
    return;
  ARM_check_safe_inc(MI);

  cs_arm_op op;
  ARM_setup_op(&op);
  op.type = ARM_OP_IMM;
  op.imm = Val;
  op.access = access;

  insert_op(MI, index, op);
}

/// Adds a register ARM operand at position OpNum and increases the op_count by
/// one.
void ARM_set_detail_op_reg(MCInst *MI, unsigned OpNum, arm_reg Reg)
{
  if (!detail_is_set(MI))
    return;
  ARM_check_safe_inc(MI);
  CS_ASSERT_RET(!(map_get_op_type(MI, OpNum) & CS_OP_MEM));
  CS_ASSERT_RET(map_get_op_type(MI, OpNum) == CS_OP_REG);

  ARM_get_detail_op(MI, 0)->type = ARM_OP_REG;
  ARM_get_detail_op(MI, 0)->reg = Reg;
  ARM_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);
  ARM_inc_op_count(MI);
}

/// Adds an immediate ARM operand at position OpNum and increases the op_count
/// by one.
void ARM_set_detail_op_imm(MCInst *MI, unsigned OpNum, arm_op_type ImmType,
         int64_t Imm)
{
  if (!detail_is_set(MI))
    return;
  ARM_check_safe_inc(MI);
  CS_ASSERT_RET(!(map_get_op_type(MI, OpNum) & CS_OP_MEM));
  CS_ASSERT_RET(map_get_op_type(MI, OpNum) == CS_OP_IMM);
  CS_ASSERT_RET(ImmType == ARM_OP_IMM || ImmType == ARM_OP_PIMM ||
          ImmType == ARM_OP_CIMM);

  ARM_get_detail_op(MI, 0)->type = ImmType;
  ARM_get_detail_op(MI, 0)->imm = Imm;
  ARM_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);
  ARM_inc_op_count(MI);
}

/// Adds the operand as to the previously added memory operand.
void ARM_set_detail_op_mem_offset(MCInst *MI, unsigned OpNum, uint64_t Val,
          bool subtracted)
{
  CS_ASSERT_RET(map_get_op_type(MI, OpNum) & CS_OP_MEM);

  if (!doing_mem(MI)) {
    CS_ASSERT_RET((ARM_get_detail_op(MI, -1) != NULL) &&
            (ARM_get_detail_op(MI, -1)->type == ARM_OP_MEM));
    ARM_dec_op_count(MI);
  }

  if ((map_get_op_type(MI, OpNum) & ~CS_OP_MEM) == CS_OP_IMM)
    ARM_set_detail_op_mem(MI, OpNum, false, 0, Val);
  else if ((map_get_op_type(MI, OpNum) & ~CS_OP_MEM) == CS_OP_REG)
    ARM_set_detail_op_mem(MI, OpNum, true, subtracted ? -1 : 1,
              Val);
  else
    CS_ASSERT_RET(0 && "Memory type incorrect.");
  ARM_get_detail_op(MI, 0)->subtracted = subtracted;

  if (!doing_mem(MI))
    ARM_inc_op_count(MI);
}

/// Adds a memory ARM operand at position OpNum. op_count is *not* increased by
/// one. This is done by ARM_set_mem_access().
void ARM_set_detail_op_mem(MCInst *MI, unsigned OpNum, bool is_index_reg,
         int scale, uint64_t Val)
{
  if (!detail_is_set(MI))
    return;
  CS_ASSERT_RET(map_get_op_type(MI, OpNum) & CS_OP_MEM);
  cs_op_type secondary_type = map_get_op_type(MI, OpNum) & ~CS_OP_MEM;
  switch (secondary_type) {
  default:
    CS_ASSERT_RET(0 && "Secondary type not supported yet.");
  case CS_OP_REG: {
    CS_ASSERT_RET(secondary_type == CS_OP_REG);
    if (!is_index_reg) {
      ARM_get_detail_op(MI, 0)->mem.base = Val;
      if (MCInst_opIsTying(MI, OpNum) ||
          MCInst_opIsTied(MI, OpNum)) {
        // Base registers can be writeback registers.
        // For this they tie an MC operand which has write
        // access. But this one is never processed in the printer
        // (because it is never emitted). Therefor it is never
        // added to the modified list.
        // Here we check for this case and add the memory register
        // to the modified list.
        map_add_implicit_write(
          MI, MCInst_getOpVal(MI, OpNum));
        MI->flat_insn->detail->writeback = true;
      } else {
        // If the base register is not tied, set the writebak flag to false.
        // Writeback for ARM only refers to the memory base register.
        // But other registers might be marked as tied as well.
        MI->flat_insn->detail->writeback = false;
      }
    } else {
      ARM_get_detail_op(MI, 0)->mem.index = Val;
    }
    ARM_get_detail_op(MI, 0)->mem.scale = scale;

    break;
  }
  case CS_OP_IMM: {
    CS_ASSERT_RET(secondary_type == CS_OP_IMM);
    if (((int32_t)Val) < 0)
      ARM_get_detail_op(MI, 0)->subtracted = true;
    ARM_get_detail_op(MI, 0)->mem.disp = ((int64_t)Val < 0) ? -Val :
                    Val;
    break;
  }
  }

  ARM_get_detail_op(MI, 0)->type = ARM_OP_MEM;
  ARM_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);
}

/// Sets the neon_lane in the previous operand to the value of
/// MI->operands[OpNum] Decrements op_count by 1.
void ARM_set_detail_op_neon_lane(MCInst *MI, unsigned OpNum)
{
  if (!detail_is_set(MI))
    return;
  CS_ASSERT_RET(map_get_op_type(MI, OpNum) == CS_OP_IMM);
  unsigned Val = MCOperand_getImm(MCInst_getOperand(MI, OpNum));

  ARM_get_detail_op(MI, -1)->neon_lane = Val;
}

/// Adds a System Register and increments op_count by one.
/// @type ARM_OP_SYSREG, ARM_OP_BANKEDREG, ARM_OP_SYSM...
/// @p Mask is the MSR mask or UINT8_MAX if not set.
void ARM_set_detail_op_sysop(MCInst *MI, int Val, arm_op_type type,
           bool IsOutReg, uint8_t Mask, uint16_t Sysm)
{
  if (!detail_is_set(MI))
    return;
  ARM_check_safe_inc(MI);

  ARM_get_detail_op(MI, 0)->type = type;
  switch (type) {
  default:
    CS_ASSERT_RET(0 && "Unknown system operand type.");
  case ARM_OP_SYSREG:
    // NOLINTBEGIN(clang-analyzer-optin.core.EnumCastOutOfRange)
    ARM_get_detail_op(MI, 0)->sysop.reg.mclasssysreg = Val;
    // NOLINTEND(clang-analyzer-optin.core.EnumCastOutOfRange)
    break;
  case ARM_OP_BANKEDREG:
    ARM_get_detail_op(MI, 0)->sysop.reg.bankedreg = Val;
    break;
  case ARM_OP_SPSR:
  case ARM_OP_CPSR:
    ARM_get_detail_op(MI, 0)->reg =
      type == ARM_OP_SPSR ? ARM_REG_SPSR : ARM_REG_CPSR;
    // NOLINTBEGIN(clang-analyzer-optin.core.EnumCastOutOfRange)
    ARM_get_detail_op(MI, 0)->sysop.psr_bits = Val;
    // NOLINTEND(clang-analyzer-optin.core.EnumCastOutOfRange)
    break;
  }
  ARM_get_detail_op(MI, 0)->sysop.sysm = Sysm;
  ARM_get_detail_op(MI, 0)->sysop.msr_mask = Mask;
  ARM_get_detail_op(MI, 0)->access = IsOutReg ? CS_AC_WRITE : CS_AC_READ;
  ARM_inc_op_count(MI);
}

/// Transforms the immediate of the operand to a float and stores it.
/// Increments the op_counter by one.
void ARM_set_detail_op_float(MCInst *MI, unsigned OpNum, uint64_t Imm)
{
  if (!detail_is_set(MI))
    return;
  ARM_check_safe_inc(MI);

  ARM_get_detail_op(MI, 0)->type = ARM_OP_FP;
  ARM_get_detail_op(MI, 0)->fp = ARM_AM_getFPImmFloat(Imm);
  ARM_inc_op_count(MI);
}

#endif

Coverage Report

Created: 2026-11-12 06:22